If your PC uses 300 watts while gaming, then one hour of play time would cost you just under 4 cents. To calculate the cost of running your PC at full load for one hour, you need to divide the watt usage by 1000 and multiply the result by your kWh. The average electricity cost in the US is 13 cents per kWh this means that it costs 13 cents to run something that consumes 1000 watts for one hour. The cheapest 10 states to live in based on residential electricity rates, according to Choose Energy. You can also compare rates between States and view the average cost in the US, which is what we will use for our comparison. If you don’t know your rate and don’t have access to your electrical bill, Choose Energy is a great resource that allows you to view electricity rates all across the US. Having extra headroom not only keeps your system safe while overclocking, it also allows for expansion later on something to keep in mind if you don’t want to fork out for a new PSU along with your upgrades.īut what about the cost to keep these systems running? We can figure that out with some simple math, so long as you know the cost per kilowatt hour (kWH) and the system power draw. The budget build isn’t likely to be overclocked, the 8100 isn’t even capable, and overclocking the 7900X in the extreme build has a massive impact on load wattage. It also doesn’t scale evenly between systems. Also, none of these calculations consider overclocking, which is why the headroom for each build is quite large. When we look at the four builds, it's apparent that a more powerful processor and video card adds significantly to the system’s power draw. Since we are talking about gaming builds, all calculations will factor in a gaming keyboard and mouse, and the resulting load draw will factor in gaming use. Then we can manually calculate power cost per hour at the average rate in the US. Let’s take a look at how the power requirements compare between different levels of performance by using Outervision’s power supply calculator with our recommended configurations in our PC build guides. While this is great if you are trying to obtain accurate data to estimate power cost, it doesn’t help you choose an appropriate power supply for your build. Simply plug the meter into the wall outlet, and your machine into the meter, and the P3 P4400 will provide an accurate reading of your machine's power draw. The best way to find out your PC's power usage is by measuring directly from the wall with a power meter like the Kill-A-Watt P3 P4400. Because manufacturer’s have different definitions of what constitutes a real world application, it’s impossible to compare TDP between manufactures. For starters, TDP only represents the maximum heat generated by a component running real world applications, it doesn’t provide an accurate representation of the components peak power. Manufacturers provide a Thermal Design Power (TDP) rating for components like CPUs and video cards which can be helpful for determining power usage-but it’s not exactly accurate. Since every PC component consumes power, and everyone’s build is tailored to their specific needs, any power estimate needs to be based on your specific components.
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